HTML5 validation issue

There is a mirror issue (https://validator.w3.org/):

Warning: The type attribute for the style element is not needed and should be omitted.

The best way is to use the function wp_add_inline_style instead of direct output. I’m testing following code:

function hook_wp_enqueue_style() {
	wp_register_style( 'blc-inline', false );
	wp_enqueue_style( 'blc-inline' );

	wp_add_inline_style( 'blc-inline', $this->plugin_conf->options['broken_link_css'] );
}

It fixes the issue because it’s use native WP functions which remove type attribute if it isn’t needed…

I hope that you will fix it in next release.

References:

Miscellaneous Developer Focused Changes in 5.3

https://core.trac.wordpress.org/ticket/42804